Download an asset's file

Download an asset’s file exactly as Athena stores or serves it — no type coercion, no pagination. Native collaborative assets are converted from live content to their canonical Office format: Athena documents download as .docx, spreadsheets as .xlsx (round-trip faithful — string identifiers, leading zeros, and number formats are preserved), PPTX Studio presentations and Word documents export their live studio content as .pptx/.docx. Uploaded files stream their original bytes. The response sets Content-Disposition with a filename derived from the asset title and media type. With live_sync=true, a spreadsheet’s .xlsx, a PPTX Studio presentation’s .pptx or a Word document’s .docx also carries the Athena for Microsoft 365 add-in’s link record, so opening it in Excel, PowerPoint or Word with the add-in installed starts syncing it with the asset; other asset types ignore the flag.